be available to
使可得到
their reports of the climate, the animals and birds, the trees and plants, and the indians of the west were made available to scientists.

be aware
意识到
i’m sure you are aware that one-third of your final grade is based on your lab work.

be bare of
written to be performed on a stage bare of scenery, thornton wilder’s play our town depicts life in a small new england community.

be beat
be very tired精疲力尽
m: it’s almost midnight. why don’t we leave those dishes until tomorrow?
w: good idea! i’m beat.

be behind in sth
延迟, 落后
m: hey, larry. wanna (= want to ) meet a few of us for coffee in a little while?
w: hmm, i would if i weren’t so far behind in this reading i’m doing for history.

be behind time
落后
m: boy, how quickly technology changes! so many people have a computer in their home nowadays.
w: i know. i feel so behind the time.

be beset with
to trouble persistently; harass
by 1970, the rail industry was beset with problems.

be better off doing sth
境况好
wouldn’t she be better off getting a good night’s sleep so she’ll feel fresh in the morning?

be bound to do sth
be certain to do sth
it’s bound to rain soon.
without a plentiful and convenient supply of some suitable writing medium, development of the arithmetic process was bound to be hampered.
be brought up
mercy warren was brought up with the values of gentility在上流社会的价值观影响下长大.

be capable of
snakes are capable of graceful motion throughout the entire length of their rubbery bodies.

be characteristic of
geologists find it useful to identify fossils in a rock sample because certain assemblages of species are characteristic of specific geologic time periods.
be clogged with
be crowded with
the roads are clogged with the traffic between the suburbs and the cities every morning and evening.

be coming into its own
正在立国时期
at a time when canada was coming into its own, they felt that a major factor因素 in the development of a strong and healthy nation was a vital有生气的 and relevant实质性的 art.

be concerned with
langston hughes, a prolific writer of the 1920’s, was concerned with the depicting the experience of urban black people in the united states