例句與造句

1. The designing of an early - warning system of missile has difficulties because it needs smaller mass , great rigidity , high strength as load on the satellite . it also needs real - time tracing and a pointing and tracking system with stationarity , rapid rotation and high precision
   設計導彈預警系統(tǒng)難點在于:作為星上載荷,要求質(zhì)量小,剛度、強度大,要實現(xiàn)實時跟蹤目標,要求指向跟蹤系統(tǒng)轉動平穩(wěn)、快速,精度高。
2. It's difficult to find real-time tracing in a sentence. 用real-time tracing造句挺難的